We recently completed an upgrade (database attach hybrid) from SharePoint 2007 to SharePoint 2010. We have come across an issue in which one of our sites used the default approval workflows, but since upgrading, these are no longer available.
Our site consumers had several workflow instances in transit during the upgrade and were able to "complete" the workflows via email but not by using the right-click menu options as the workflows are no longer available.
No workflow option were activated for the site or site collection in 2010. What do we need to activate/configure in order to make these available again?